Translation of "gradually" into Swahili

It may be a gradual work, but it doesn’t have to be a cheerless one.

Inaweza kuwa kazi ya polepole, lakini haihitaji kuwa ya kuchosha.

Do the following actions as the children pretend it is raining—softly at first, and then gradually harder.

Fanya vitendo vifuatavyo huku watoto wakijifanya kuwa mvua inanyesha—pole pole kwanza, na kisha kidogo kidogo ikinyesha sana.